Acid resistant linings and toppings are heavier-duty systems then coatings. Linings are approx. 1–2 mm thick systems, toppings are normally 2–8 mm in thickness.
Linings and toppings are more suitable than thinner coatings for repair of acid attacked concrete, for example when there is the need to fill areas removed by highly corrosive chemicals. These materials can be either poured, sprayed or trowelled into place.
An epoxy resin is a compound that contains the reactive epoxide group.
These groups can react by cross-linking with other compounds called hardeners or curing agents, forming rigid three-dimensional networks. Many types of curing agents can be used to impart different properties to the finished product. Among these curing agents are aliphatic amines, aromatic amines and cycloaliphatic amines.
There are two main types of epoxy resins:
Bisphenol A: Formed by the reaction of Bisphenol A and epichlorohydrin
Epoxy Novolac (also called epoxy phenol novolac): Formed by the reaction of phenol and formaldehyde.
Epoxy Novolac resins have higher functionality than Bisphenol A resins, which means they have more sites available for cross-linking with hardeners. This higher cross-link density results in products with higher chemical and temperature resistance.
Metz 33-TG is a trowellable epoxy flooring system used to produce a less textured heavy duty flooring solution. Normal applied thickness is 6 mm. Application is by hand or power trowel.
Metz 33-VG is the accompanying “vertical grade” epoxy trowellable used for epoxy coving, pits, kerbs, plinths and walls. Normal applied thickness is min. 3 mm.
Metz Epoxy Plaster is an epoxy formulation designed as a stand-alone trowellable lining in medium physical duty environments. Can also be used as a substrate repair material beneath other Metz resinous systems.
Typical Uses: Food and Industrial Plants, Chemical Plant plinths, walls, kerbs, trenches or pits.
Metz 33EN-TG is an epoxy novolac trowellable flooring formulation exhibiting greater resistance to highly corrosive chemicals than most epoxies. Normal applied thickness is 6 mm. Application is by hand or power trowel.
Metz 33EN-VG is the accompanying “vertical grade” epoxy novolac trowellable used for epoxy coving, pits, kerbs, plinths and in highly corrosive environments. Normal applied thickness is a minimum of 3mm.
Metz 33EN-Plaster is an epoxy novolac formulation with exceptional chemical resistance designed as a stand-alone trowellable lining in medium physical duty corrosive environments. Can also be used as a substrate repair material beneath other Metz epoxy novolac applications.
Typical Uses: Chemical Plant plinths, walls, kerbs, trenches or pits.
There are many different types of polyurethanes ranging from soft, elastomeric compounds to rigid materials and polymer concretes.
Two-part polyurethanes consist of a polyalcohol and a polyisocyanate which react to form a cross-linked polymer.
Three-part polyurethanes combine polyurethene and concrete techologies
The properties of the end product can be modified by altering the type of polyalcohol and isocyanate used, the mix ratio of these components and the fillers incorporated in the system.
Metz 95M is a 2 part polyurethane chemical resistant membrane or lining system where some flexibility is required.
Metz 93PU-TG is an outstandingly tough, abrasion, temperature, impact and chemical resistant trowellable polyurethane flooring system used in a wide variety of industrial applications. Normal application thickness is 6 – 8 mm.
Typical Uses: Chemical Plants, Food Plants, Breweries, Dairy Industry.
Metz 93PU-VG is the accompanying “vertical grade” polyurethane trowellable used for coving, pits, kerbs, plinths and walls. Normal applied thickness is 6 mm.